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ENGINE NATIVEACCEPTS TEXT

URL Encode/Decode

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URL Encode & Decode — Free Online Tool

Encode special characters for URLs or decode percent-encoded strings.

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MAX SIZENONE
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01Paste your URL or component string into the input area.
02Choose whether to encode or decode.
03Copy the result with one click.

About URL Encode/Decode

URL encoding (also known as percent encoding) replaces special characters with %XX hex codes so they can be safely used in URLs and query parameters without breaking the URL structure. Characters like spaces, ampersands, equals signs, question marks, and non-ASCII Unicode characters all need encoding when included in URLs. This tool encodes text using JavaScript's encodeURIComponent function and decodes percent-encoded strings back to readable text. It is indispensable for web developers constructing API URLs with dynamic parameters, debugging query strings with encoded values, preparing redirect URLs, and working with OAuth callback URLs that contain encoded parameters. Paste a URL to see the decoded version and understand what parameters it contains, or type plain text to get the properly encoded version for safe inclusion in a URL. The tool correctly handles multi-byte Unicode characters, which is important for internationalized URLs.

Questions

Is my data sent to a server?

No. All processing happens locally in your browser. No data leaves your device.

What is URL encoding?

URL encoding (percent-encoding) replaces special characters with a % followed by their hex code. For example, a space becomes %20 and an ampersand becomes %26. This ensures URLs are valid and unambiguous.

When should I URL-encode text?

Encode text when including it in query parameters, form data, or any part of a URL that might contain special characters like spaces, ampersands, or non-ASCII characters.

Does it handle Unicode characters?

Yes. Non-ASCII characters like emoji and international text are encoded as UTF-8 byte sequences, each byte represented as a percent-encoded value.

Is my file uploaded to a server?

No. Transmute processes everything locally in your browser using JavaScript and WebAssembly. Your files never leave your device — there is no server, no upload, no cloud processing.

Related

Base64 Encode/DecodeEncode text or a whole file to Base64, and decode Base64 back to text. Everything runs in this tab — no upload and no server round trip.TXT → B64HTML Entity Encode/DecodeEncode and decode HTML entities — convert special characters like <, >, & to HTML-safe text and back. Supports numeric and named entities.TXT → HTMLJWT DecoderDecode JWT tokens to inspect header, payload claims, and expiration. Tokens are parsed locally — never sent to a server, safe for production debugging.JWT → JSONHash GeneratorGenerate SHA-1, SHA-256, SHA-512, and MD5 hashes from text or files. Use for integrity checks, fingerprints, and quick deduplication.TXT → HASH